Table B-5a. Estimated Measures of Reliability for Hazardous Material Shipment Characteristics by Selected Origin State (1) : 2012
(Estimates are based on data from the 2012 Commodity Flow Survey)
| Origin state | Value | Tons | Ton-miles (2) |
Average miles per shipment— coefficient of variation of number |
|||
|---|---|---|---|---|---|---|---|
| Coefficient of variation of number | Standard error of percent of total | Coefficient of variation of number | Standard error of percent of total | Coefficient of variation of number | Standard error of percent of total | ||
| United States | 3.1 | 0.0 | 3.7 | 0.0 | 6.2 | 0.0 | 7.8 |
| Texas | 6.8 | 1.7 | 8.8 | 2.1 | 17.1 | 2.9 | 13.0 |
| Louisiana | 12.5 | 0.9 | 11.5 | 1.0 | 14.4 | 2.1 | 9.7 |
| California | 10.8 | 0.7 | 12.1 | 0.7 | 22.2 | 1.0 | 38.0 |
| Illinois | 13.4 | 0.8 | 13.0 | 0.8 | 18.2 | 1.5 | 23.7 |
| Connecticut | 39.1 | 1.6 | 41.4 | 1.6 | 36.6 | 0.3 | 41.7 |
| Florida | 14.1 | 0.5 | 12.3 | 0.4 | 14.3 | 0.4 | 23.4 |
| Ohio | 12.0 | 0.2 | 13.7 | 0.3 | 18.5 | 0.3 | 16.0 |
| New Jersey | 20.6 | 0.5 | 25.8 | 0.6 | 17.8 | 0.1 | 26.6 |
| Oklahoma | 17.2 | 0.3 | 17.3 | 0.3 | 20.5 | 0.3 | 20.0 |
| New York | 15.2 | 0.4 | 22.7 | 0.5 | 26.6 | 0.3 | 16.6 |
| Washington | 21.4 | 0.4 | 24.5 | 0.5 | 31.5 | 0.3 | 23.0 |
| Pennsylvania | 13.6 | 0.3 | 15.2 | 0.3 | 23.6 | 0.4 | 24.6 |
| Indiana | 19.6 | 0.3 | 18.0 | 0.2 | 11.1 | 0.1 | 16.2 |
| Wisconsin | 17.7 | 0.3 | 20.8 | 0.4 | 27.3 | 0.4 | 17.6 |
| Massachusetts | S | S | S | S | S | S | 29.2 |
| Georgia | 11.1 | 0.1 | 10.6 | 0.1 | 18.5 | 0.2 | 7.9 |
| Michigan | 11.2 | 0.2 | 14.9 | 0.2 | 22.5 | 0.2 | 27.9 |
| Kentucky | 15.9 | 0.2 | 21.0 | 0.3 | 29.7 | 0.4 | 20.8 |
| Tennessee | 25.0 | 0.3 | 22.8 | 0.3 | 14.2 | 0.2 | 25.7 |
| Kansas | 11.3 | 0.1 | 13.3 | 0.2 | 26.1 | 0.3 | 24.7 |
KEY: S = Withheld because estimate did not meet publication standards.
(1) Selected states shown had the highest estimated weight without considering sampling variability and are shown in descending order. Since an “All other states” line is not shown, estimates do not add to total.
(2) Ton-miles estimates are based on estimated distances traveled along a modeled transportation network. See “Mileage Calculations” section for additional information.
NOTES: The Introduction and appendixes give information on confidentiality protection, sampling error, nonsampling error, sample design and definitions. Links to this information on the Internet may be found at <www.census.gov/econ/cfs>.
SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2012 Economic Census: Transportation Commodity Flow Survey, December 2014.